No. Kirk was born in Iowa (To George and Winona Kirk) and is a full blooded human. Spock was born on Vulcan to a human mother (Amanda) and Vulcan father (Sarek). They are just best friends and are in no way related.
For the majority of the movie, Kirk addresses him simply as "Spock". Later, after Kirk has been promoted to Captain, he begins referring to him as "Mr. Spock."
Spock and Dr. Leonard McCoy listened to the last taped orders of Captain Kirk in Star Trek The Original Series episode "The Tholian Web".
captain kirk
Jim is a normal nickname for someone whose full name is James.
Captain James Tiberuies Kirk
Well, that would be a bit of a spoiler. But Spock is loyal (ugh, emotion) to his friend and Kirk. So, even though Spock and Sybok are half brothers Spock remains loyal to the Captain.
Spock
For the majority of the movie, Kirk addresses him simply as "Spock". Later, after Kirk has been promoted to Captain, he begins referring to him as "Mr. Spock."
The original series .
no spock is the first officer of Enterprise. Captain Kirk is the leader. So if Kirk is away or dead then Spock takes over. This is if you are referring to the original series.
If you mean commanding officer as in James T. Kirk's superior, it would have been Captain Christopher Pike. If you mean Kirk's second in command (first officer), it would have been Spock.In the 2009 movie Star Trek, Captain Christopher Pike made Spock acting captain and James T. Kirk the acting first officer before he (Pike) was taken captive by the Romulans. Later in the film, Kirk provokes Spock to attack him, which soon after Spock is forced to relinquish his command due to being emotionally compromised. Kirk then assumes the role of captain, and Spock becomes his first officer.In the sequel Star Trek Into Darkness, Kirk is demoted for violating the Prime Directive and (now Admiral) Pike becomes commanding officer of the USS Enterprise. He then takes in Kirk and makes him first officer. Kirk later regains the role of captain after Admiral Pike was assassinated.
Spock
Spock and Dr. Leonard McCoy listened to the last taped orders of Captain Kirk in Star Trek The Original Series episode "The Tholian Web".
1) spock 2) captain kirk 3) enterprise 4) outer space 5) klingons 6) phasers
In the Original Series, the CO (commanding officer) is the captain of the ship, Captain James T. Kirk. However, Spock is of the rank commander, if that's what you were asking.
The cast of Reflections on Spock - 2004 includes: Paul Comi as Stiles Phyllis Douglas as herself Jeffrey Hunter as Captain Pike Jill Ireland as Leila Kalomi DeForest Kelley as Dr. Bones Nichelle Nichols as Uhura Leonard Nimoy as Spock William Shatner as Captain Kirk
Spock's half brother is called Sybok.